CN107533386A - Active stylus - Google Patents

Active stylus Download PDF

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Publication number
CN107533386A
CN107533386A CN201680027928.6A CN201680027928A CN107533386A CN 107533386 A CN107533386 A CN 107533386A CN 201680027928 A CN201680027928 A CN 201680027928A CN 107533386 A CN107533386 A CN 107533386A
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CN
China
Prior art keywords
signal
mode
stylus
switching
pen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201680027928.6A
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Chinese (zh)
Other versions
CN107533386B (en
Inventor
原英之
井出信孝
小田康雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wacom Co Ltd
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Wacom Co Ltd
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Application filed by Wacom Co Ltd filed Critical Wacom Co Ltd
Priority to CN202011533174.6A priority Critical patent/CN112578918B/en
Publication of CN107533386A publication Critical patent/CN107533386A/en
Application granted granted Critical
Publication of CN107533386B publication Critical patent/CN107533386B/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
    • G06F3/0383—Signal control means within the pointing device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545—Pens or stylus
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0441—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0442—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

Will position detecting device only corresponding with first method and only in the case of corresponding with second method position detecting device arrangement use, stylus can need not be changed when whenever detector for movable position with the consumption electric power lower than ping-pong.The active stylus of the present invention possesses signal processing part (24), in the action of signal processing part (24) in the flrst mode, the down link signal (DS1) that grade (P) will be pressed according to pen and is modulated to pulse column signal supplies to electrode (21), on the other hand, determine a need for the switching to second mode, in action under the second mode, the down link signal (DS2) that grade (P) will be pressed according to pen and is modulated to sine wave signal supplies to electrode (21), on the other hand, determine a need for the switching to first mode, the action under second mode is switched in the case where being judged to needing the switching to second mode, the action under first mode is switched in the case where being judged to needing the switching to first mode.

Description

Active stylus
Technical field
The present invention relates to active stylus, more particularly to active stylus corresponding with multiple modes.
Background technology
A kind of position detecting system of known active electrostatic means, can using in order to carry out finger detection and in touch surface The electrode for preparing in plate detects the presence of stylus, position.The stylus used in this position detecting system is referred to as " main Dynamic formula stylus ", to send letter to the sensor controller in position detecting device by the electrostatic coupling with above-mentioned electrode Number mode form.Sensor controller detects the presence of stylus, position by being detected to the signal.
As one of this active stylus, Patent Document 1 discloses a kind of touch-control formed as follows Pen：Position signalling that the export for aiming at coordinate data is used and the number for representing the information such as the intrinsic ID of pen pressure value, stylus It is believed that number to sensor controller send.
Patent Document 2 discloses other examples of active stylus.The stylus of this send in digital form into Result obtained from the pressure detection of row pen.Also, in patent document 2, position is formed by display device and clear sensor Detection means, position detecting device detect the indicating positions of stylus and the touch position of pen pressure and finger by clear sensor Put both.
In addition, in recent years, largely occur possessing using electrostatic coupling to send the electronic equipment of the stylus of signal.And And the position detecting system included as these electronic equipments, mutually multiple signals without interchangeability can be utilized to send Mode.Specifically, the signal sent as stylus, using to pulse column signal (including pulse signal, square-wave signal) What the mode (hereinafter referred to as " first method ") for the signal being modulated and use were modulated to sine wave signal The mode (hereinafter referred to as " second method ") of signal is mixed to deposit.
Patent Document 3 discloses the one of the position detecting system for following first method.The stylus of this possesses light Detect to the property learned the pen pressure test section and signal transmission unit of pen pressure.As shown in Figure 10 of patent document 3, what signal transmission unit was sent Signal includes the position signalling pulse 910 used in detection of the position detecting device to the position of stylus and represents to pass through pen pressure The pressure signal pulse 950 of the grade for the pen pressure that test section detects.Position signalling pulse 910 is intermittently sent, pressure letter Punching 950 feel the pulse when detecting pen pressure when operating state (non-hovering), put in place the transmission of signal pulse 910 interval ( Gap) send.Position signalling pulse 910 is made up of the AC pulses of assigned frequency (being specially 28.125Hz), pressure signal pulse 950 Formed by having carried out warbled pulse signal.
One of the position detecting system for following first method is also disclosed that in patent document 4.The stylus of this is for example special Possess TX drive circuits 680 as shown in Fig. 9 of sharp document 4, be thus configured to send the TX letters used when detecting with finger Number 632 identical pulse column signals are TX signals 677.Coupled capacitor of the TX signals 677 between stylus and sensor and Detected by controller.
It should be noted that the method ([0084] of boosting when stylus transmission signal is also disclosed in patent document 4 Section).Accordingly, will in order to be responsible for amplification of the chip drive circuit 890 of the transmission of TX signals 835 to TX signals 835 Amplifier 870 is located at stylus.
In contrast, the position detecting system disclosed in patent document 1,2 follows second method.The stylus of second method It is configured to press grade etc. to be modulated sine wave signal according to pen and sends, rather than such as the signal used during finger detection Pulse column signal as (signal sent from sender electrode of the sensor controller into sensor).Specifically, such as It is configured to that hundreds of~number MHz carrier signal is modulated and sent by ASK or OOK.Sensor controller is in order to carry Take the signal of said frequencies and via bandpass filter reception signal, and recover pen pressure value.
Prior art literature
Patent document
Patent document 1：No. 2015/111159 publication of International Publication No.
Patent document 2：Japanese Unexamined Patent Publication 2014-63249 publications
Patent document 3：No. 8536471 specifications of U.S. Patent No.
Patent document 4：U.S. Patent Application Publication No. 2012-0105362 specifications
The content of the invention
Problems to be solved by the invention
Position detecting device only corresponding with second method can not receive the transmission of stylus only corresponding with first method Signal, position detecting device only corresponding with first method can not receive the transmission letter of stylus only corresponding with second method Number.As a result, for example user be intended to by only with first method corresponding to position detecting device and corresponding only with second method Position detecting device arrange and be used alternatingly in the case of, stylus must be changed whenever detector for movable position, very It is inconvenient.
On the other hand, consider to be configured to alternately to send by stylus the transmission signal generated in the first way (such as to pulse The signal that column signal is modulated) and the transmission signal that generates in a second manner (such as sine wave signal is modulated The signal formed).Hereinafter, such mode for forming stylus is referred to as " ping-pong ".According to ping-pong, energy Enough make some in position detecting device only corresponding with first method and position detecting device only corresponding with second method The transmission signal of stylus is received, therefore stylus need not be changed whenever detector for movable position.However, generally can not Two position detecting devices can be used simultaneously, therefore under this methodology, the signal of one party is invalidly sent all the time.From stylus The angle of low consumption electrification set out, this is not preferred state.
Therefore, an object of the present invention be to provide it is a kind of will position detecting device only corresponding with first method and , can be with the low consumption lower than ping-pong in the case of position detecting device arrangement use only corresponding with second method Electric power need not change the active stylus of stylus when whenever detector for movable position.
The active stylus of the present invention is via the coupled capacitor formed between the active stylus and sensor And the change of information and electric field is established to the active stylus accordingly sent to sensor controller, the active touch-control Pen possesses：Core body, form nib；Electrode, near the core body；Pen pressure test section, detects and puts on the core body Pen pressure corresponding to pen pressure grade；Power supply；And signal processing part, by the electric power that is supplied from the power supply in the first pattern and Either mode in second mode is acted, and in action in the first mode, grade will be pressed according to the pen to arteries and veins Rush the first transmission signal that column signal is modulated to supply to the electrode, on the other hand, determine a need for described The switching of second mode, in action in the second mode, according to the pen grade will be pressed to adjust sine wave signal Make the second transmission signal formed to supply to the electrode, on the other hand, determine a need for the switching to the first mode, The action under the second mode is switched in the case where being judged to needing the switching to the second mode, is being judged to needing The action under the first mode is switched in the case of switching to the first mode.
The active stylus of the another way of the present invention is formed via between the active stylus and sensor Coupled capacitor and the change of information and electric field is established to the active stylus accordingly sent to sensor controller, it is described Active stylus possesses：Core body, form nib；Electrode, near the core body；Pen pressure test section, for detect with Put on pen corresponding to the pen pressure of the core body and press grade；Power supply；And signal processing part, pass through the electricity supplied from the power supply Either mode of the power in the first pattern and in second mode is acted, will be according to institute in action in the first mode State pen pressure grade spike train is modulated obtained from first transmission signal supply to the electrode, another aspect, by The signal that receives determines a need for the switching to the second mode during not sending the first transmission signal, In action in the second mode, by according to the pen press grade and by with the tune being modulated to the spike train Mode processed it is different modulation system generation second transmission signal supply to the electrode, another aspect, determine a need for The switching of the first mode, the second mode is switched in the case where being judged to needing the switching to the second mode Under action, the action under the first mode is switched in the case where being judged to needing switching to the first mode.
Invention effect
According to the present invention, pattern switching is determined a need in stylus side, stylus itself is switched according to the result Pattern, therefore stylus can be made in the case of corresponding only to the position detecting device of first method and being used together Pattern be first mode, make touch-control in the case of corresponding only to the position detecting device of second method and being used together The pattern of pen is second mode.Therefore, it is possible to be used together in the position detecting device with corresponding only to first method In the case of do not send the second transmission signal, in the case of corresponding only to the position detecting device of second method and being used together The mode for not sending the first transmission signal forms stylus, therefore will position detecting device only corresponding with first method and only , can be with lower than above-mentioned ping-pong low in the case of the arrangement use of corresponding with second method position detecting device Consumption electric power need not change stylus when whenever detector for movable position.
Brief description of the drawings
Fig. 1 is the figure of the structure for the position detecting system 1 for representing embodiments of the present invention.
Fig. 2 is the figure of the use state for the position detecting system 1 for representing embodiments of the present invention.
Fig. 3 is the figure of the structure for the position detecting device 3 for representing embodiments of the present invention.
Fig. 4 is the figure of the structure for the stylus 2 for representing the background technology of the present invention.
Fig. 5 is to represent (to carry out on-off tune by one of the data-signal d1D generated of the control unit 90a shown in Fig. 4 The situation of pulse column signal after system) figure.
Fig. 6 is to represent (to carry out frequency modulation(PFM) by the data-signal d1D generated of the control unit 90a shown in Fig. 4 another example The situation of pulse column signal afterwards) figure.
Fig. 7 is to represent (to carry out on-off tune by one of the data-signal d2D generated of the control unit 90a shown in Fig. 4 The situation of sine wave signal after system) figure.
Fig. 8 is the flow chart for representing the processing that the control unit 90a shown in Fig. 4 is carried out.
Fig. 9 is to represent the figure of one by the signals generated of the control unit 90a shown in Fig. 4.
Figure 10 is the figure of the structure for the stylus 2 for representing the first embodiment of the present invention.
Figure 11 is the flow chart for representing the processing that the control unit 90b shown in Figure 10 is carried out.
Figure 12 is the flow chart for the details for representing the action under the first mode shown in Figure 11.
Figure 13 is the flow chart for the details for representing the action under the second mode shown in Figure 11.
Figure 14 is to represent the figure of one by the signals generated of the control unit 90b shown in Figure 10.
Figure 15 is the figure of the structure for the stylus 2 for representing second embodiment of the present invention.
Figure 16 is the flow chart of the details of the action under the second mode for representing the control unit 90c shown in Figure 15.
Figure 17 is to represent the figure of one by the signals generated of the control unit 90c shown in Figure 15.
Figure 18 is the figure of the structure for the stylus 2 for representing third embodiment of the present invention.
Figure 19 is the flow chart of the details of the action under the first mode for representing the control unit 90d shown in Figure 18.
Figure 20 is the flow chart of the details of the action under the second mode for representing the control unit 90d shown in Figure 18.
Figure 21 is to represent the figure of one by the signals generated of the control unit 90d shown in Figure 18.
Figure 22 is the figure of the structure for the stylus 2 for representing the 4th embodiment of the present invention.
Figure 23 is the figure of the structure for the stylus 2 for representing the 5th embodiment of the present invention.
Embodiment
Hereinafter, embodiments of the present invention are explained referring to the drawings and.
Fig. 1 is the figure of the structure for the position detecting system 1 for representing embodiments of the present invention.As shown in the drawing, position is examined Examining system 1 is configured to possess stylus 2 and position detecting device 3.
Stylus 2 is that possess the function that down link signal DS is sent to position detecting device 3 and receiving position detection dress Put the position indicator of the function of the uplink signal US transmitted by 3.The down link signal DS that stylus 2 is sent includes shape Formula different two kinds of down link signals DS1, DS2 (first and second sends signal).Shown in Fig. 9 as be described hereinafter, downgoing line Signal DS1 is to include unmodulated pulse column signal i.e. burst d1B and the data being modulated to pulse column signal Signal d1D signal.As down link signal DS1 concrete example, the descending of the modulation system that patent document 3 is recorded can be enumerated Line signal or identical with the pulse column signal that the sender electrode of from the touch panel to mutual capacitive way supplies or there is phase The down link signal of the mode that pulse column signal is sent from stylus of closing property.Also, down link signal DS2 is comprising work The letter of burst d2B and the data-signal d2D being modulated to sine wave signal for unmodulated sine wave signal Number.As down link signal DS2 concrete example, the downgoing line letter used can be enumerated in such as active ES (trade mark) mode Number.
As shown in figure 1, stylus 2 is configured to core body 20, electrode 21, pen pressure test section 22, switch 23, signal transacting Portion 24 and power supply 25.
Core body 20 be configured in a manner of the length direction of the core body 20 is consistent with a direction of principal axis for stylus 2 it is bar-shaped Part, form the nib of stylus 2.Conductive material is coated with the surface of the leading section of core body 20, forms electrode 21.Core The rearward end of body 20 abuts with pen pressure test section 22.The nib of stylus 2 is being pressed on position detection dress by pen pressure test section 22 The pressure (the pen pressure for putting on core body 20) of front end of the detection with putting on core body 20 is corresponding when putting 3 touch surface 3a (aftermentioned) etc. Pen pressure grade (shown in Fig. 4 described later etc. pen pressure grade P), therefore in concrete example, by electrostatic capacitance according to a pressure The switchable capacitive module for changing is formed.
Electrode 21 is provided at the electric conductor near core body 20, is electrically connected by distribution with signal processing part 24.In signal Processing unit 24 by down link signal DS to electrode 21 supply when, in electrode 21 sensing produce the down link signal DS with supply Corresponding electric charge.Thus, the electrostatic capacitance in sensor 30 described later changes, and position detecting device 3 is by detecting the change Change to receive down link signal DS.Also, when the uplink signal US that position detecting device 3 is sent reaches electrode 21, Sensing produces electric charge corresponding with the uplink signal US reached in electrode 21.Signal processing part 24 is by detecting so in electricity Electric charge caused by sensing receives uplink signal US in pole 21.
Switch 23 is the side switch for example set in the side of the housing of stylus 2, as can receive user's The input unit that the mode of operation is formed works.Specifically, with the state (down state) of the operation according to user come defeated The mode for going out in Fig. 4 described later etc. the switching information SW shown is formed.Switching information SW is for example to represent to switch on and off two The information of either one in state.
Signal processing part 24 has the uplink signal US sent via the receiving position detection means 3 of electrode 21 function Institute is sent with generation down link signal DS (down link signal DS1, DS2) and via electrode 21 towards position detecting device 3 State down link signal DS (down link signal DS1, DS2) function.It should be noted that uplink signal US is sometimes such as It is aftermentioned to include instruction like that.In this case signal processing part 24 by being demodulated to the uplink signal US received and Decrypt to obtain instruction, down link signal DS generation is carried out according to the instruction of acquirement.
Power supply 25 is used to act electric power (DC voltage) to the supply of signal processing part 24, therefore by the AAAA of such as cylinder type Battery is formed.
As shown in figure 1, position detecting device 3 is configured to sensor 30, sensor controller 31 and system controller 32, the sensor 30 forms touch surface 3a, and the system controller 32 including sensor 30 and sensor controller 31 to existing Each portion of interior position detecting device 3 is controlled.
Sensor controller 31 have via sensor 30 receive stylus 2 send down link signal DS function and Uplink signal US function is sent towards stylus 2 via sensor 30.
Although illustrate only a position detecting device 3 in Fig. 1, sensor controller 31 has and can receive downlink Road signal DS1 but the type (position detecting device only corresponding with above-mentioned first method that down link signal DS2 can not be received 3) and can receive down link signal DS2 but can not receive down link signal DS1 type (only with above-mentioned second method Corresponding position detecting device 3).The stylus 2 of present embodiment has following feature：It is configured to these positions detecting dress In the case of putting 3 both arrangement uses, it can be existed with the low consumption electric power of ping-pong more described later than 4~Fig. 9 of reference picture Stylus 2 need not be changed whenever detector for movable position 3.
Fig. 2 is the figure of one of the use state for representing position detecting system 1.The figure shows respectively figure 1 illustrates Position detecting device 3 is that two kinds of position detecting devices 3A, 3B are arranged on a desk, and a user is touched using one Control pen 2 and input picture to position detecting device 3A respectively, the example of article is inputted to position detecting device 3B.The present invention is so In the case of play effect.It should be noted that in the example in figure 2, position detecting device 3A, 3B are respectively via access point 5 It is connected with server (not shown), in the server, to the position detecting device 3A pictures inputted and to position detecting device 3B The article of input is integrated into as text document.
Fig. 3 is the figure for the structure for representing position detecting device 3.The figure together illustrates the position inspection of two above-mentioned types The structure of device 3 is surveyed, the part related to uplink signal US transmission is the type that can receive down link signal DS2 Position detecting device 3 specific to structure.In other words, the position detection dress of down link signal DS2 type can not be received Put 3 sending functions for not having uplink signal US.
As shown in figure 3, sensor 30 have multiple wire electrode 30X and multiple wire electrode 30Y be configured to it is rectangular Structure, Capacitance Coupled is carried out by these wire electrodes 30X, 30Y and stylus 2.The sensor 30 is used to not only stylus 2 Detection, and be used in the detection of finger.Also, sensor controller 31 is configured to sending part 60, selector 40, connect Receipts portion 50, logic section 70 and MCU80.
Sending part 60 is the circuit for sending the uplink signal US shown in Fig. 1.Specifically, it is configured to include Model supply unit 61, switch 62, DIFFUSION TREATMENT portion 63, character string maintaining part 64 and transmission protection portion 65.It should be noted that its In especially with respect to model supply unit 61, illustrate to be contained in sending part 60 in present embodiment, but MCU80 can also be contained in It is interior.
Model supply unit 61 has following function：Detection model c1 is kept, according to the control signal supplied from logic section 70 Ctrl_t1 instruction, continuously output is corresponding with detection model c1 repeatedly in (such as 3msec) during defined continuously transmit Signal (or bit string).Also, also there is following function：This continuously transmit during just terminate after or control described later When information c2 transmission starts, defined parted pattern STP twice is at least continuously exported.
Detection model c1 is the mould of the value of the symbol used for the presence of the detection sensor controller 31 of stylus 2 Type, in advance (before stylus 2 detects to sensor controller 31) known to stylus 2.Symbol is in transmission processing It is the unit (unit for sending the information of signal representation) of the information for modulation, is to reception signal i.e. 1 in reception processing The unit for the information that symbol is demodulated and obtained.The value of symbol can include the value (hereinafter referred to as " bit string pair for being converted into bit string Should be worth ") and it is not converted into the value (hereinafter referred to as " non-bit string respective value ") of bit string by have received the stylus 2 of symbol.As after Shown in the table 1 stated, the former symbol takes the value of the number of 2 exponentiation, can be corresponding with the bit string foundation such as " 0001 ".So pass through The bit length of each symbol of bit string statement is determined by the specification in DIFFUSION TREATMENT portion 63.On the other hand, the symbol of the latter takes more than one The value of (such as two), the not corresponding value of bit string foundation with being expressed as " P " " M " etc. is taken as shown in table 1 as be described hereinafter. In one shown in table 1 described later, " P " and " M " respectively with it is defined diffusion character string and this it is defined spread character string it is anti- It is corresponding to turn character string foundation.
Detection model c1 is represented by the model of non-bit string respective value.Specifically, pass through as " PMPMPM ... " The repetitions of two non-bit string respective values " P " " M " is formed.
Parted pattern STP is the model of the symbol for the end during above-mentioned continuously transmit to be notified to stylus 2, by Detection model c1 repeatedly in the model of symbol that does not occur form.Give one example, as described above, such as In the case that " PMPMPM ... " forms detection model c1 by the repetition of two non-bit string respective values " P " " M " like that, split mould Type STP can be made up of the model " PP " for making non-bit string respective value " P " form twice in succession.Can also make parted pattern STP and Detection model c1 structure forms parted pattern in turn, by " PM ", and detection model c1 is formed by " PP ".
Switch 62 has following function：Supplied based on the control signal ctrl_t2 supplied from logic section 70 come preference pattern Either one in portion 61 and MCU80, the output of a side of selection is supplied to DIFFUSION TREATMENT portion 63.Model is have selected in switch 62 In the case of supply unit 61, detection model c1 or parted pattern STP is supplied to DIFFUSION TREATMENT portion 63.On the other hand, in switch 62 In the case of have selected MCU80, control information c2 is supplied from MCU80 to DIFFUSION TREATMENT portion 63.
Control information c2 is the information for including the instruction for representing the instruction content to stylus 2, is generated by MCU80.Control Information c2 includes value (such as 0~15) with the corresponding symbol of adjustable length bit string foundation, the value between stylus 2 not Share in advance, this puts different from detection model c1.Also, control information c2 is represented by being worth " D ", the value " D " represents above-mentioned rule The value of the number (value 8) of 2 long exponentiation is positioned, this point is different from the detection model c1 comprising value " P " " M ".
Character string maintaining part 64 has following function：Based on the control signal ctrl_t3 supplied from logic section 70, generation tool There is the diffusion character PN of the 11 chips length of autocorrelation performance and kept.Character string maintaining part 64 keep diffusion character PN to DIFFUSION TREATMENT portion 63 supplies.
DIFFUSION TREATMENT portion 63 has following function：Value based on the symbol via the supply of switch 62 (passes through DIFFUSION TREATMENT portion 63 processing and by the information of transmission signal representation) the diffusion character PN kept by character string maintaining part 64 is modulated, It is derived from the transmission chip row of 12 chips length.Hereinafter, for the function, enumerate concrete example and illustrate.
It is in example described below, detection model c1, parted pattern STP, control information c2 is corresponding by bit string respectively Value 0~15 (corresponding bit string " 0000 "~" 1111 ") and the combination of non-bit string respective value " P " " M " are formed.Also, set character string guarantor The diffusion character PN for holding the holding of portion 64 is " 00010010111 ".In this case, DIFFUSION TREATMENT portion 63 will according to following table 1 The value (0~15 and P and M) of each symbol is converted into transmission chip row.
[table 1]
As shown in table 1, in this embodiment, the value " P " of symbol first is converted into diffusion character PN's " 00010010111 " The transmission chip row that front is added upper " 1 " and formed.Also, value " 0 "~" 7 " of symbol are converted into respectively makes diffusion character The hair that the front for the character string that PN " 00010010111 " is formed with the touring displacement of displacement shown in table 1 is added upper " 1 " and formed Send chip alignment.Value " M " " 8 "~" 15 " of other symbols be converted into respectively make it is corresponding with the value of symbol " P " " 0 "~" 7 " Transmission chip column inversion and form transmission chip row.
DIFFUSION TREATMENT portion 63 is configured to that conversion process more than and arranged to obtain transmission chip, and the transmission chip is arranged Supplied to protection portion 65 is sent.
Sending protection portion 65 has following function：Based on the control signal ctrl_t4 supplied from logic section 70, in uplink Between reception period during road signal US transmission with receiving the signal from stylus 2, insert to switch sending action With reception action without i.e. guard period during being transmitted and receiving both.
Selector 40 be the control in logic-based portion 70 and to during the transmission of signal is sent from sensor 30 and passing through biography The switch that the reception period of the reception signal of sensor 30 switches over.Illustrate, selector 40 is configured to include switching 44x, 44y With conductor selection circuit 41x, 41y.Switch 44x is acted as follows：Based on the control signal supplied from logic section 70 STRx, the output end of sending part 60 is connected with conductor selection circuit 41x input during transmission, will be led in reception period Body selection circuit 41x output end is connected with the input of acceptance division 50.Switch 44y is acted as follows：Based on from The control signal sTRy that logic section 70 supplies, by the defeated of the output end of sending part 60 and conductor selection circuit 41y during transmission Enter end connection, be connected conductor selection circuit 41y output end with the input of acceptance division 50 in reception period.Conductor selection electricity Road 41x is acted as follows：Based on the control signal selX supplied from logic section 70, multiple wire electrode 30X are selected One or more of, one or more wire electrode 30X of selection are connected with switch 44x.Conductor selection circuit 41y is with such as Under type is acted：Based on the control signal selY supplied from logic section 70, select one in multiple wire electrode 30Y or It is multiple, one or more wire electrode 30Y of selection are connected with switch 44y.Selected by conductor selection circuit 41x, 41y more Individual wire electrode 30X or multiple wire electrodes 30Y is the situation that uplink signal US is for example sent from touch surface 3a whole face.
Acceptance division 50 is to receive the downgoing line of the transmission of stylus 2 for the control signal ctrl_r in logic-based portion 70 Signal DS (down link signal DS1 or down link signal DS2) circuit.Specifically, be configured to include amplifying circuit 51, Detecting circuit 52 and simulation numeral (AD) converter 53.
The down link signal DS supplied from selector 40 is amplified and exported by amplifying circuit 51.Detecting circuit 52 is generation The circuit of voltage corresponding with the grade of the output signal of amplifying circuit 51.A/d converter 53 is by with specific time interval pair The voltage exported from detecting circuit 52 is sampled and generates the circuit of data signal.A/d converter 53 export data signal to MCU80 is supplied.
Down link signal DS1 can be received but the position detecting device 3 of down link signal DS2 type can not be received The acceptance division 50 included is configured to the signal for receiving unmodulated pulse column signal or being modulated to pulse column signal, On the other hand (or can not receive) unmodulated sine wave signal or the signal being modulated to sine wave signal are not received. Therefore, for MCU80 in this case, only numeral is supplied from acceptance division 50 when down link signal DS1 reaches sensor 30 Signal.On the other hand, down link signal DS2 can be received but the position inspection of down link signal DS1 type can not be received The acceptance division 50 that surveying device 3 includes is configured to receive unmodulated sine wave signal or be modulated sine wave signal to form Signal, on the other hand do not receive (or can not receive) unmodulated pulse column signal or pulse column signal be modulated and forms Signal.Therefore, for MCU80 in this case, only supplied when down link signal DS2 reaches sensor 30 from acceptance division 50 To data signal.
Logic section 70 and MCU80 are the control that the transmission reception action to sending part 60 and the grade of acceptance division 50 is controlled Portion.Illustrate, MCU80 is that internally have ROM and RAM and the microprocessor acted based on regulated procedure.It is another Aspect, logic section 70 are configured to the control based on MCU80 to export above-mentioned each control signal.Also, MCU80 is configured to carry out Coordinate data x, y of position etc. of stylus 2 are represented and to system to export based on the data signal supplied from a/d converter 53 The processing and represent data-signal d1D or data-signal d2D in the data signal supplied from a/d converter 53 that controller 32 exports In the case of obtain the data Res represented from the data signal and the processing exported to system controller 32.
Hereinafter, the processing that the structure of stylus 2 and stylus 2 are carried out is described in detail, but explanation is using above-mentioned first The stylus 2 of ping-pong, then illustrate the stylus 2 of the first~the 5th embodiment of the present invention.
Fig. 4 is the figure of the structure for the stylus 2 for representing the background technology of the present invention.Stylus 2 shown in the figure is using upper The ping-pong stated, equivalent to the present invention background technology, but with the touch-control of the described later first~the 5th embodiment Pen 2 is equally that the inventor of the present invention invents, and is not known in the priority date of the application.
As shown in figure 4, it is configured to using the stylus 2 of ping-pong except at the signal also showed that in Fig. 1 Beyond reason portion 24 and power supply 25, also with enlarging section 26.Signal processing part 24 is configured to control unit 90a, boosting section 91, shaken Swing portion 92a, switch portion 93a.It should be noted that during the function that signal processing part 24 has is shown in Fig. 4 and uplink The function of road signal US reception correlation, but the stylus 2 of the embodiments of the present invention as be described hereinafter is such, using friendship For can also set the function related to uplink signal US reception in the stylus 2 of sending method.
Boosting section 91 has following function：By being boosted the DC voltage supplied from power supply 25 to generate direct current Press V1.In concrete example, boosting section 91 is made up of dc-dc or charge pump circuit.
Oscillating portion 92a has following function：Oscillation action is carried out based on the DC voltage supplied from power supply 25, thus given birth to Into the unmodulated sine wave signal (carrier signal) vibrated with assigned frequency.Enlarging section 26 has following function：With defined Magnifying power amplifies the sine wave signal generated by oscillating portion 92a, thus generates unmodulated sine wave signal v2.Enlarging section 26 It is preferred that it is made up of as shown in Figure 4 the amplifying circuit being made up of transformer and capacitor.
Switch portion 93a is the switch element of SP3T type, is configured to the end being connected with the output end of boosting section 91 Sub- a, the terminal b being connected with the output end of enlarging section 26, the terminal g and electricity being connected with being supplied to the power supply wiring of earthing potential The common terminal c that pole 21 connects.
Control unit 90a is supplied with the IC of the control signal Ctrl for being controlled to switch portion 93a, with by from power supply The electric power of 25 supplies is formed come the mode acted.In concrete example, control unit 90a can be ASIC or MCU.
Send down link signal DS1 when control unit 90a so that switch portion 93a as be located at boosting section 91 output end The mode that first switch portion between electrode 21 works is controlled to switch portion 93a.That is, carry out terminal a with it is common The state and terminal g of terminal c connections switch switch portion 93a processing between the state of the sub- c connections in go side together.Terminal a is together The state of the sub- c connections in go side corresponds to the state that first switch portion connects, and the state of terminal g c connections in go side together corresponds to The state that first switch portion disconnects.
The timing of burst d1B in down link signal DS1 is sent, control unit 90a are come all with the defined cycle Carry out to phase property switch portion 93a switching control.In the case of terminal a together sub- c connections in go side, DC voltage V1, which turns into, to be opened Pass portion 93a output voltage.On the other hand, in the case of terminal the g together sub- c connections in go side, earthing potential turns into switch portion 93a output voltage.Therefore, unmodulated pulse column signal is exported from switch portion 93a, this turns into burst d1B.
On the other hand, the timing of the data-signal d1D in down link signal DS1 is sent, control unit 90a press according to pen The data such as grade P or switching information SW Res carries out switch portion 93a switching control.It should be noted that data Res also may be used With other information such as the identification information comprising stylus 2.Control unit 90a is generated based on data Res by the switching control The pulse column signal modulated i.e. data-signal d1D.
As the concrete mode of the modulation of the pulse column signal carried out based on control unit 90a, there are various ways to be contemplated that.With Under, for the situation for situation and the frequency of use modulation modulated using on-off, concrete example is shown and illustrated.
Fig. 5 is to represent (to carry out the pulse after on-off modulation by one of the control unit 90a data-signal d1D generated Column signal) figure.In this case control unit 90a is when data Res sending object position is " 1 " by switch portion 93a to terminal a Lateral incision is changed, and changes switch portion 93b to terminal g lateral incisions when data Res sending object position is " 0 ".Thus, data-signal d1D Turn into following binary signal as shown in Figure 5：Turn into high level (=DC voltage when sending object position is " 1 " V1), low level (=earthing potential) is turned into when sending object position is " 0 ".
Fig. 6 is to represent (to carry out the spike train after frequency modulation(PFM) by the control unit 90a data-signal d1D generated another example Signal) figure.In this case control unit 90a carries out switch portion 93b switching control with frequency corresponding with data Res value System.For example, shown in Fig. 6 the data that data Res is 8 and by the data of 8 represent value be x in the case of control Portion 90a carries out the example of switch portion 93b switching control with frequency N-x × m [Hz].As shown in the example, data in this case Signal d1D turns into the pulse column signal vibrated with frequency corresponding with data Res value.
Fig. 4 is returned to, control unit 90a when sending down link signal DS2 is located at enlarging section 26 so that switch portion 93a is used as Output end and electrode 21 between the mode that works of second switch portion switch portion 93a is controlled.That is, carry out in terminal The state of the sub- c connections in go side and terminal g switch switch portion 93a processing between the state of the sub- c connections in go side to b together together.End The state of sub- b c connections in go side together corresponds to the state that second switch portion connects, the state of terminal g c connections in go side together The state disconnected corresponding to second switch portion.
Switch portion 93a is fixed on by the timing of the burst d2B in down link signal DS2 is sent, control unit 90a Terminal b sides.Therefore, unmodulated sine wave signal v2 is exported from switch portion 93a, this turns into burst d2B.
On the other hand, the timing of the data-signal d2D in down link signal DS2 is sent, control unit 90a are based on pen pressure The data such as grade P or switching information SW Res carries out switch portion 93a switching control.It should be noted that in this case, Other information such as the identification information of stylus 2 can also be included in data Res.Control unit 90a is given birth to by the switching control Into the sine wave signal modulated based on data Res i.e. data-signal d2D.
As the concrete mode of the modulation of the sine wave signal carried out based on control unit 90a, modulated using on-off.
Fig. 7 is to represent (to carry out the sine after on-off modulation by one of the control unit 90a data-signal d2D generated Ripple signal) figure.Control unit 90a changes switch portion 93a to terminal b lateral incisions when data Res sending object position is " 1 ", Switch portion 93b is changed to terminal g lateral incisions when data Res sending object position is " 0 ".Thus, data-signal d2D is as shown in Figure 7 As turn into following signal：Turn into sine wave signal v2 when sending object position is " 1 ", when in sending object position being " 0 " It is fixed on earthing potential.
Here, the state identical all not sent with what is turned into, it is recognized that when being " 0 " in sending object position by Fig. 7 State.In order to prevent should what state for all not sending continue, control unit 90a can make data Res Manchester character first Change, switch portion 93a switching control is carried out based on the data Res of Manchester character, thus generate data-signal d2D.
Fig. 4 is returned to, control unit 90a is configured to alternately send down link signal DS1 and down link signal DS2.This It is to be able to make position detecting device 3 only corresponding with down link signal DS1 and only corresponding with down link signal DS2 Any one in position detecting device 3 all receives the transmission signal of stylus 2, due to alternately send down link signal DS1, DS2, so inventor herein is referred to as " ping-pong ".Hereinafter, specifically illustrate.
Fig. 8 is the flow chart for representing the processing that control unit 90a is carried out.Also, Fig. 9 represents to be generated by control unit 90a The figure of one of signal.It should be noted that Fig. 9 transverse axis represents the time, the upside of transverse axis represents to send Tx, and downside represents to connect Receive Rx.Hereinafter, with reference to these figures and go on to say.
First, as shown in figure 9, control unit 90a be configured to constant cycle T 1 be repeated down link signal DS1, DS2 transmission processing.In each cycle T 1, control unit 90a is believed with down link signal DS1 burst d1B, downgoing line Number DS1 data-signal d1D, down link signal DS2 burst d2B, down link signal DS2 data-signal d2D Order carry out the transmission processing of each signal.D1 (d1 ＜ T1) time in down link signal DS1 transmission service life T1 To perform, in down link signal DS2 transmission service life T1 d2 (d2=T1-d1) time perform.Need what is illustrated It is usual d1 ＜ d2.
Here, T1 and d2 occurrence is preferably with the down link signal DS2 carried out based on control unit 90a the transmission cycle With the stylus (sending function i.e. without down link signal DS1 based on the transmission for corresponding only to down link signal DS2 Stylus) the down link signal DS2 transmission cycle equal mode that carries out selected.By so, in sensor The side of controller 31, the situation identical that can be transmitted with the stylus of the transmission with corresponding only to down link signal DS2 Cycle receives down link signal DS2.It should be noted that it is being intended to send and is corresponding only to down link signal DS2 hair During the down link signal DS2 for the stylus identical data volume sent, it is believed that due to needing to carry out down link signal DS1's Send and the time it is insufficient, but in such a case it is possible to drop a side in burst d2B and data-signal d2D or two sides Low transmission data volume.For example, the stylus for setting the transmission for corresponding only to down link signal DS2 sends N number of symbol in a cycle Number, control unit 90a can only send M (M ＜ N) symbols within a cycle of cycle T 1.
Also, the section filled in Fig. 9 with round dot represents to send sine wave signal v2 section.According to the statement, such as should Shown in figure, data-signal d2D turns into the signal intermittently sent.This illustrated corresponding to reference picture 7 as send pair Signal processing part 24 does not export sine wave signal v2 when as position being " 0 ".
The flow chart of reference picture 8, down link signal DS1 transmission (step is first begin to during control unit 90a start to process S1).Then, down link signal DS1 transmission is carried out while monitoring the process (step S2) of time, when by providing Between d1 when start down link signal DS2 transmission (step S3).Then, while carrying out down link signal DS2 transmission one Side monitor the time process (step S4), by stipulated time d2 when return to step S1 and start again at down link signal DS1 transmission.In this way, control unit 90a is alternately carried out down link signal DS1, DS2 transmission.Thereby, it is possible to make only with In position detecting device 3 corresponding to row line signal DS1 and position detecting device 3 only corresponding with down link signal DS2 Any one all receives the transmission signal of stylus 2.
On the other hand, according to control unit 90a control, both down link signal DS1, DS2 are sent repeatedly all the time.This One party in sample down link signal DS1, DS2 is invalidly sent all the time, therefore as described above, low from stylus 2 disappears The angle of consumption electrification is set out not preferred.Currently invention addresses problem as ping-pong, realizes with than alternately sending The low consumption electric power of mode need not change stylus when whenever detector for movable position 3.Hereinafter, for the first of the present invention ~the five embodiment, is described in detail successively.
Figure 10 is the figure of the structure for the stylus 2 for representing the first embodiment of the present invention.Stylus 2 shown in the figure takes There is control unit 90b and switch portion 93b for control unit 90a and switch portion 93a, this puts different from the stylus 2 shown in Fig. 4. Other points are identical with the stylus 2 shown in Fig. 4, therefore mark same label for same structure, are conceived to difference below Illustrate.
Switch portion 93b has added terminal r on switch portion 93a, turns into hilted broadsword four-throw type.Terminal r is via buffer and control Portion 90b processed receiving terminal connection.Also, control unit 90b on control unit 90a except having added connecing for uplink signal US Receive beyond function, be also configured such as being acted with the either mode in first and second pattern.
On uplink signal US receive capabilities, control unit 90b is configured to temporally split to be transmitted and connect Receive.That is, control unit 90b is not to be formed in a manner of it can be transmitted and receive simultaneously.Control unit 90b for transmission Elemental motion is as the above-mentioned action on control unit 90a.On the other hand, when being received, control unit 90b passes through control Signal Ctrl processed changes switch portion 93b to terminal r lateral incisions.Thus, receiving terminal of the electric charge occurred in electrode 21 to control unit 90b Son supply, therefore the uplink signal that control unit 90b is sent based on the electric charge so supplied come receiving position detection means 3 US。
First mode is the pattern that stylus 2 sends down link signal DS1.On the other hand, second mode is stylus 2 Send down link signal DS2 pattern.It is handled as follows in the actions of control unit 90b in the flrst mode：By above-mentioned Processing and generate down link signal DS1 and supplied to electrode 21, on the other hand determine a need for cutting to second mode Change.On the other hand, it is handled as follows in action under the second mode：Down link signal is generated by above-mentioned processing DS2 simultaneously supplies to electrode 21, on the other hand determines a need for the switching to first mode.Control unit 90b is based in each pattern The presence or absence of uplink signal US reception carry out these judgements.Also, as the result judged, be judged to needing to In the case of the switching of second mode, the action of itself is switched to the action under second mode.Also, be judged to needing to In the case of the switching of first mode, the action of itself is switched to the action under first mode.Hereinafter, specifically said It is bright.
Figure 11~Figure 13 is the flow chart for representing the processing that control unit 90b is carried out.Also, Figure 14 is to represent to pass through control unit The figure of one of the signal of 90b generations.It should be noted that Figure 14 transverse axis represents the time, the upside of transverse axis represents to send Tx, Downside represents to receive Rx.Hereinafter, with reference to these figures and go on to say.
First, as shown in figure 14, the constant cycle T 1 (defined first that control unit 90b is configured to also show that in Fig. 9 Cycle) intermittently send down link signal DS1.This is the action under first mode.More specifically, control unit 90b structures As since each cycle T 1 most the short stipulated time d1 of ratio cycle T 1 send down link signal DS1.Between so Down link signal DS1 is sent to having a rest property, therefore during being certainly existed in cycle T 1 without sending action.Control unit 90b carries out the detection operation for the uplink signal US that position detecting device 3 is sent using electrode 21 using during this period.And And the switching to second mode is determined a need for according to the testing result.Therefore, control unit 90b is with the judgement of cycle T 1 The no switching needed to second mode.
Switch to the control unit 90b after second mode and be configured to intermittent with constant cycle d2 (defined second round) Ground sends down link signal DS2.It should be noted that cycle d2 duration can be with the stipulated time d2 that is shown in Fig. 9 It is equal, can also be unequal.The intermittent transmission is realized in the following way as described above：In data-signal d2D hair When sending, sine wave signal v2 is exported from signal processing part 24 in the case of being " 1 " in sending object position, on the other hand in transmission pair As position is not export sine wave signal v2 from signal processing part 24 in the case of " 0 ".Therefore, down link signal DS2 interval The transmission of property is carried out in burst d2B transmission as also showed that in Figure 14, but data-signal d2D's Carried out in transmission.Control unit 90b is utilized because the intermittent transmission from signal processing part 24 without exporting sine wave signal v2 During, the detection operation for the uplink signal US that position detecting device 3 is sent is carried out using electrode 21.Also, according to The result of detection and the switching to first mode is determined a need for according to cycle d2.
The flow chart of reference picture 11, control unit 90b are configured to alternately perform the sub- example for carrying out the action under first mode Journey (step S10) and the subroutine (step S30) for carrying out the action under second mode.Details reference picture 12 and Figure 13 are said It is bright, but the processing is not through the switching for carrying out step S10 and step S30 that comes according to the time, but is based on each sub- example The result for the determination processing of pattern switching that whether what is performed in journey need carries out step S10 and step S30 switching, this point with The control unit 90a shown in Fig. 8 processing is different.Hereinafter, the processing in describing step S10, S30 in detail each.
Figure 12 is the flow chart for the details for representing the action (the step S10 shown in Figure 11) under first mode.Such as the figure institute Show, the control unit 90b in being acted under first mode is first begin to down link signal DS1 (to be believed comprising burst d1B and data Number d1D) transmission (step S11).Then, down link signal DS1 transmission is carried out while monitoring the process (step of time Rapid S12), when by stipulated time d1, start uplink signal US reception (step S13).Also, when by providing Between dr (dr≤T1-d1) when (step S14), terminate uplink signal US reception (step S15), cycle T 1 as defined in wait Process (step S16), determine whether maintain first mode (step S17).
Here, as described above, the position detecting device 3 that can only receive down link signal DS2 type has Uplink signal US ability is sent, the down link signal DS2 position detecting device 3 of type can not be received without upper Row line signal US sending function.Therefore, uplink signal US is received to be meant to receive down link signal DS2 Position detecting device 3 be present near stylus 2.Therefore, control unit 90b is held in this subroutine in step S17 During row (more specifically, since in step s 13 uplink signal US reception on terminating in step S15 During untill row line signal US reception) receive uplink signal US in the case of, stylus 2 can send descending Line signal DS2, therefore, it is determined that not maintain first mode (switching to second mode).On the contrary, held in this subroutine In the case of not receiving uplink signal US during row, it is judged as receiving down link signal DS2 position inspection Survey device 3 to be not present near stylus 2, be judged to maintaining first mode (not switching to second mode).
It is determined as in step S17 in the case of maintaining first mode, control unit 90b return to step S11 is simultaneously continued with. That is, the step S10 shown in Figure 11 subroutine (action under first mode shown in Figure 12) is repeated.On the other hand, In the case of being judged to not maintaining first mode in step S17, control unit 90b exit steps S10 subroutine simultaneously continues to locate Reason.Thus, the step S30 subroutine (action under second mode shown in Figure 13) shown in Figure 11 is started.
Figure 13 is the flow chart for the details for representing the action (the step S30 shown in Figure 11) under second mode.Such as the figure institute Show, the control unit 90b in being acted under second mode is first begin to burst d2B transmission (step S31).Burst d2B The transmission time predefine, then control unit 90b by judge this it is predetermined transmission time whether expire to judge to dash forward Whether signalling d2B transmission terminates (step S32).
Then, control unit 90b carry out with form data-signal d2D each sending object position (data Res everybody.But, In the case where carrying out Manchester character be carried out Manchester character data Res everybody) be followed successively by object Circular treatment (step S33).The circular treatment is repeated (step S38) during untill cycle d2 passes through.
In step S33 circular treatment, control unit 90b judges whether sending object position is " 1 " (step S34) first. In managing in this place, negative judgement is carried out in the case of being " 0 " in sending object position.It should be noted that the data of sending object As long as Res be not present in the case of step S34 result of determination and sending object position to be set to negative i.e. as the situation of " 0 " Can.
In the case of negatory result is obtained in step S34, control unit 90b starts uplink signal US reception (step S35).On the other hand, in step S34 obtain certainty result in the case of, control unit 90b carry out it is up Terminate uplink signal US reception action (step S36) in the case of line signal US reception action, on this basis Start the sine wave signal v2 of 1 amount transmission (step S37).
Start uplink signal US reception in step s 35 afterwards or start sine wave signal in step S37 After v2 transmission, control unit 90b determines whether to have passed through cycle d2 (step S38).Also, be determined as without situation Lower return to step S34, processing is repeated using ensuing sending object position as object.On the other hand, sentence in step S38 It is set in the case of have passed through cycle d2, exits circular treatment and be made whether to maintain the judgement (step S39) of second mode.
The benchmark of step S39 judgement is preferably identical with the benchmark of the judgement in the step S17 shown in Figure 12.That is, control Portion 90b preferably during this subroutine performs (more specifically, since step S35 uplink signal US During untill receiving the reception for terminating uplink signal US into step S36.In a second mode, exist during this period more It is secondary) receive uplink signal US in the case of, be determined as maintain second mode (not switching to first mode), conversely exist In the case that this subroutine does not receive uplink signal US during performing, it is judged to not maintaining second mode (i.e. Switch to first mode).
It is determined as in step S39 in the case of maintaining second mode, control unit 90b return to step S31 is simultaneously continued with. Thus, the step S30 shown in Figure 11 subroutine (action under second mode shown in Figure 13) is repeated.The opposing party Face, in the case of being judged to not maintaining second mode in step S39, control unit 90b exit steps S30 subroutine and continuation Processing.Thus, the step S10 subroutine (action under first mode shown in Figure 12) shown in Figure 11 is started.
As described above, according to the structure of the stylus 2 of present embodiment and action, judge in the side of stylus 2 Whether need pattern switching, stylus 2 pattern of itself switched according to the result, thus can with correspond only under The position detecting device 3 of row line signal DS1 reception makes the pattern of stylus 2 be the first mould in the case of being used together Formula, make stylus 2 in the case where the position detecting device 3 of the reception with corresponding only to down link signal DS2 is used together Pattern be second mode.Therefore, it is possible to be filled with being detected in the position of the reception with corresponding only to down link signal DS1 Put in the case that 3 (position detecting devices for corresponding only to above-mentioned first method) are used together and do not send down link signal DS2, (above-mentioned second method is corresponded only in the position detecting device 3 of the reception with corresponding only to down link signal DS2 Position detecting device) be used together in the case of do not send down link signal DS1 mode and form stylus, therefore by this , can be with than the stylus 2 using the ping-pong shown in Fig. 4 in the case that a little position detecting devices 3 arrange use Low consumption electric power need not change stylus when whenever detector for movable position 3.
Then, Figure 15 is the figure of the structure for the stylus 2 for representing second embodiment of the present invention.Touch-control shown in the figure Pen 2 substitutes control unit 90b and has control unit 90c, and this puts different from the stylus 2 shown in Figure 10.In other points and Figure 10 The stylus 2 shown is identical, therefore marks same label for same structure, is conceived to difference below to illustrate.
On control unit 90c, the processing in second mode is different from control unit 90b, and other put identical with control unit 90b. Specifically, it is configured to judge whether the stylus 2 is in use in action under the second mode, is not only being determined as Uplink signal US reception action is carried out in the case of being in use, is not entered in the case where being judged to being in use Row uplink signal US reception action.Hereinafter, specifically illustrate.
Figure 16 is the flow chart of the details of the action under the second mode for representing control unit 90c.Also, Figure 17 is to represent logical Cross the figure of one of the signal of control unit 90c generations.It should be noted that Figure 17 transverse axis represents time, the upside table of transverse axis Show and send Tx, downside represents to receive Rx.Hereinafter, with reference to these figures and go on to say.
As shown in figure 16, control unit 90c performs the processing (reference picture 13) of step S31, S32 in the same manner as control unit 90b. Then, control unit 90c judges whether the stylus 2 is in use (step S40).As long as the judgement is based on such as pen pressure grade Whether P is more than 0 to carry out.That is, in the case where pen pressure grade P is more than 0, possibility that stylus 2 contacts with touch surface 3a Property it is higher, therefore, it is determined that to be in use, in the case where pen pressure grade P is less than 0, stylus 2 is left from touch surface 3a Possibility it is higher, therefore, it is determined that to be not in use.Also, in the case where switching information SW is connects, also may be used To be determined as that stylus 2 is in use.In this case, it can determine whether stylus 2 is to make according to the meaning of user In.
It is determined as that the control unit 90c in the case of being in use starts data-signal d2D transmission in step s 40 (step S41).The transmission in the case where " 0 " is in sending object position from signal processing part 24 due to not exporting just as described above String ripple signal v2 and turn into intermittent transmission as shown in Figure 17.Control unit 90b using this interval send gap and Carried out uplink signal US reception action, but control unit 90c as also showed that in Figure 17 without Reception acts.It is because being judged to being in use in step s 40, it is taken as that stylus 2 continues using such processing Near the position detecting device 3 that can receive down link signal DS2, it is not necessary that switch to first mode.
On the other hand, it is determined as that the control unit 90c in the case of being not in use starts uplink in step s 40 Signal US reception (step S42).In this case reception action is continuously carried out as also showed that in Figure 17.It can enter This successional reception action of row is because thinking in the case where being not in use It is not necessary to send data-signal D2D, therefore without data-signal d2D transmission.
Then, control unit 90c continues data-signal d2D transmission or uplink signal US reception, until by week Untill phase d2 (step S43), in the case of being judged to have passed through cycle d2 in step S43, it is made whether to maintain second mode Judgement (step S44).
In step S44 judgement, (that is, judge in the situation of the reception action in not carrying out step S42 in step S40 Situation about being in use for stylus 2) under, make the judgement for unconditionally maintaining second mode.Therefore, in this case Step S44 can be omitted.On the other hand, in the case of reception action has been carried out in step S42, according to being shown in Figure 13 Step S39 identicals determinating reference come be made whether maintain second mode judgement.
It is determined as in step S44 in the case of maintaining second mode, control unit 90c return to step S31 is simultaneously continued with. Thus, the step S30 shown in Figure 11 subroutine (action under second mode shown in Figure 16) is repeated.The opposing party Face, in the case of being judged to not maintaining second mode in step S44, control unit 90c exit steps S30 subroutine and continuation Processing.Thus, the step S10 subroutine (action under first mode shown in Figure 12) shown in Figure 11 is started.
As described above, according to the structure of the stylus 2 of present embodiment and action, except obtaining with first in fact Beyond the identical effect of stylus 2 for applying mode, also obtaining can continuously be carried out during longer than first embodiment Effect as row line signal US reception.Thereby, it is possible to receive uplink with the precision higher than first embodiment Signal US.
Then, Figure 18 is the figure of the structure for the stylus 2 for representing third embodiment of the present invention.Touch-control shown in the figure Pen 2 substitutes control unit 90b and has control unit 90d, and this puts different from the stylus 2 shown in Figure 10.In other points and Figure 10 The stylus 2 shown is identical, therefore marks same label for same structure, is conceived to difference below to illustrate.
Control unit 90d is not based on the presence or absence of uplink signal US reception, but based on the switch 23 shown in Fig. 1 The user received is operated to determine a need for the switching to first mode or second mode, and this point and control unit 90b are not Together, other are put identical with control unit 90b.Hereinafter, specifically illustrate.
Figure 19 and Figure 20 is the flow chart for representing the processing that control unit 90d is carried out.Also, Figure 21 is to represent to pass through control unit The figure of one of the signal of 90d generations.It should be noted that Figure 21 transverse axis represents the time, the upside of transverse axis represents to send Tx, Downside represents to receive Rx.Hereinafter, with reference to these figures and go on to say.
Figure 19 is the flow chart for the details for representing the action (the step S10 shown in Figure 11) under first mode.Such as the figure institute Show, the control unit 90d in being acted under first mode performs step S11 processing (reference picture in the same manner as control unit 90b first 12).Then, without the step S12~S15 shown in Figure 12 processing, the standby (step untill cycle T 1 as defined in passing through S16).Due to the processing without step S12~S15, so the action as also showed that in Figure 21 in the flrst mode In can not carry out uplink signal US reception.After have passed through cycle T 1, control unit 90d is judged based on switching information SW (step S18) is indicated with the presence or absence of the pattern switching of user.In other words, the switching to second mode is determined a need for.
In the case of being determined as no pattern switching instruction in step S18, control unit 90d return to step S11 simultaneously continues Processing.Thus, the step S10 shown in Figure 11 subroutine (action under first mode shown in Figure 19) is repeated.Separately On the one hand, in the case of being determined to have pattern switching instruction in step S18, control unit 90b exit steps S10 subroutine And continue with.Thus, the step S30 subroutine (action under second mode shown in Figure 20) shown in Figure 11 is started.
Figure 20 is the flow chart for the details for representing the action (the step S30 shown in Figure 11) under second mode.Such as the figure institute Show, the control unit 90d in being acted under second mode performs step S31~S38 processing (ginseng in the same manner as control unit 90b first According to Figure 13).Therefore, the transmission of each signal under second mode receives same with first embodiment as also showed that in Figure 21 Carry out sample.Then, control unit 90d substitutes the step S39 shown in Figure 13 determination processing, and carries out being based on switching information SW To determine whether the processing (step S50) for the pattern switching instruction that user be present.In other words, determine a need for the first mould The switching of formula.
In the case of being determined as no pattern switching instruction in step s 50, control unit 90d return to step S31 simultaneously continues Processing.Thus, the step S30 shown in Figure 11 subroutine (action under second mode shown in Figure 20) is repeated.Separately On the one hand, in the case of being determined to have pattern switching instruction in step s 50, control unit 90d exit steps S10 subroutine And continue with.Thus, the step S10 subroutine (action under first mode shown in Figure 19) shown in Figure 11 is started.
As described above, can be according to user's according to the structure of the stylus 2 of present embodiment and action Clearly indicate to switch first mode and second mode.Therefore, as first and second embodiment, will only with it is descending Position detecting device 3 corresponding to line signal DS1 reception and the corresponding position detection only with down link signal DS2 reception , can be with the consumption electricity lower than the stylus 2 using the ping-pong shown in Fig. 4 in the case that device 3 arranges use Power need not change stylus when whenever detector for movable position 3.
It should be noted that in the present embodiment, pass through the step in the processing to the control unit 90b shown in Figure 13 S39 modifies to form control unit 90d processing, but can also pass through the processing of the control unit 90c to being shown in Figure 13 In step S44 similarly modify to form control unit 90d processing.In this case, as second embodiment, Can also obtain can receive effect as uplink signal US with the precision higher than first embodiment.
Then, Figure 22 is the figure of the structure for the stylus 2 for representing the 4th embodiment of the present invention.Touch-control shown in the figure Pen 2 substitutes control unit 90d and oscillating portion 92a and has control unit 90e and oscillating portion 92b, this point and the touch-control shown in Figure 10 Pen 2 is different.Other points are identical with the stylus 2 shown in Figure 10, therefore mark same label for same structure, have in mind below Illustrated in difference.
Switch portion 93b is fixed as cutting by control unit 90e when generation forms down link signal DS2 data-signal d2D Terminal b state is changed to, on the other hand presses the data such as grade P or switching information SW Res to carry out shaking for oscillating portion 92b according to pen The control of state is swung, rather than carries out switch portion 93a switching control.Specifically, in the case of being " 1 " in sending object position It is oscillatory regime to make oscillating portion 92b, and it is vibration halted state that oscillating portion 92b is made in the case of being " 0 " in sending object position.And And switch portion 93b is fixed as being switched to terminal b state and by oscillating portion by control unit 90e during generation burst d2B 92b is fixed as oscillatory regime.
According to the structure of the stylus 2 of present embodiment and action, as the stylus 2 of first embodiment, also can It is enough to send down link signal DS2 from stylus 2.On other points, stylus 2 and the first embodiment of present embodiment Stylus 2 is identical, therefore the structure according to the stylus 2 of present embodiment and action, as first embodiment, will only Position detecting device 3 corresponding with down link signal DS1 reception and the corresponding position only with down link signal DS2 reception , also can be with lower than the stylus 2 using the ping-pong shown in Fig. 4 in the case of putting the arrangement use of detection means 3 Consumption electric power stylus need not be changed when whenever detector for movable position 3.
It should be noted that it can not only be carried out in the stylus 2 of first embodiment and present embodiment identical Down link signal DS2 generation, and can be carried out in the stylus 2 of second and third embodiment and present embodiment Identical down link signal DS2 generation, this is self-evident.
Then, Figure 23 is the figure of the structure for the stylus 2 for representing the 5th embodiment of the present invention.Touch-control shown in the figure Pen 2 substitutes boosting section 91 and has rectification part 94, and this puts different from the stylus 2 shown in Figure 10.Other points in Figure 10 with showing The stylus 2 gone out is identical, therefore marks same label for same structure, is conceived to difference below to illustrate.
Rectification part 94 is whole to the sine wave signal v2 progress exported from enlarging section 26 by using diode and capacitor Flow and generate DC voltage V1 circuit.Supplied by the DC voltage V1 that rectification part 94 generates to switch portion 93b terminal a.
According to the structure of the stylus 2 of present embodiment and action, as the stylus 2 of first embodiment, also can It is enough to send down link signal DS1 from stylus 2.On other points, stylus 2 and the first embodiment of present embodiment Stylus 2 is identical, therefore the structure according to the stylus 2 of present embodiment and action, as first embodiment, will only Position detecting device 3 corresponding with down link signal DS1 reception and the corresponding position only with down link signal DS2 reception , also can be with lower than the stylus 2 using the ping-pong shown in Fig. 4 in the case of putting the arrangement use of detection means 3 Consumption electric power stylus need not be changed when whenever detector for movable position 3.
Also, according to the structure of the stylus 2 of present embodiment, it is not necessary to boosting section 91, therefore can simplify at signal The structure in reason portion 24.
It should be noted that it can not only be carried out in the stylus 2 of first embodiment and present embodiment identical DC voltage V1 generation, and can be carried out in the stylus 2 of the second~the 4th embodiment identical with present embodiment DC voltage V1 generation, this is self-evident.But, in the stylus 2 applied to the 4th embodiment, it is necessary to It is oscillatory regime to make oscillating portion 92b during down link signal DS1 transmission in advance.
The preferred embodiment of the present invention is this concludes the description of, but the present invention is not any by such embodiment Limit, the present invention can be implemented in a variety of ways in the range of its purport is not departed from, and this is self-evident.
For example, in the respective embodiments described above, carried out in stylus 2 based on the presence or absence of uplink signal US reception In the case of the judgement of pattern switching, uplink signal US content is not considered, but stylus 2 can be also based on uplink Road signal US content carrys out the presence or absence of determinating mode switching.In this case, can be according to from the bright of sensor controller 31 True indicates to switch the pattern of stylus 2.
Also, in the respective embodiments described above, make uplink signal US be by detection model c1, parted pattern STP and The signal that control information c2 is formed, but it is that simple triggering is believed that the present invention, which also can suitably be applied to uplink signal US, Number situation etc..
Label declaration
1 position detecting system
2 styluses
3rd, 3A, 3B position detecting device
3a touch surfaces
5 access points
20 core bodys
21 electrodes
22 pressure test sections
23 switches
24 signal processing parts
25 power supplys
26 enlarging sections
30 sensors
30X, 30Y wire electrode
31 sensor controllers
32 system controllers
40 selectors
41x, 41y conductor selection circuit
44x, 44y are switched
50 acceptance divisions
51 amplifying circuits
52 detecting circuits
53 analog-digital converters
60 sending parts
61 model supply units
62 switches
63 DIFFUSION TREATMENT portions
64 character string maintaining parts
65 send protection portion
70 logic sections
90a~90e control units
91 boosting sections
92a, 92b oscillating portion
93a, 93b switch portion
94 rectification parts
Ctrl control signals
D1B bursts
D1D data-signals
D2B bursts
D2D data-signals
DS1, DS2 down link signal
P pens press grade
Res data
STP parted patterns
SW switching informations
US uplink signals
V1 DC voltages
V2 sine wave signals

Claims (15)

1. a kind of active stylus, via the coupled capacitor formed between the active stylus and sensor by information with The change of electric field is established accordingly to be sent to sensor controller, wherein,
The active stylus possesses：
Core body, form nib；
Electrode, near the core body；
Pen pressure test section, detect pen pressure grade corresponding with the pen pressure for putting on the core body；
Power supply；And
Signal processing part,
The signal processing part,
Acted by the electric power supplied from the power supply and the either mode in the first pattern and in second mode,
In action in the first mode, grade will be pressed according to the pen and pulse column signal is modulated the One transmission signal supplies to the electrode, on the other hand, determines a need for the switching to the second mode,
In action in the second mode, grade will be pressed according to the pen and sine wave signal is modulated the Two transmission signals supply to the electrode, on the other hand, determine a need for the switching to the first mode,
The action under the second mode is switched in the case where being judged to needing the switching to the second mode, is being judged The action under the first mode is switched in the case of to need the switching to the first mode.
2. active stylus according to claim 1, wherein,
In the action of the signal processing part in the first mode, intermittently send described first and send signal, it is another Aspect, the uplink transmitted by position detecting device is carried out using the electrode in no transmission the first transmission signal The detection operation of road signal, determined a need for according to the testing result of the uplink signal to the second mode Switching.
3. active stylus according to claim 2, wherein,
The signal processing part is configured in action in the first mode, is intermittently sent with the defined period 1 Described first sends signal, and determines a need for the switching to the second mode with the period 1.
4. according to active stylus according to any one of claims 1 to 3, wherein,
In the action of the signal processing part in the second mode, intermittently send described second and send signal, it is another Aspect, the uplink transmitted by position detecting device is carried out using the electrode in no transmission the second transmission signal The detection operation of road signal, determined a need for according to the testing result of the uplink signal to the first mode Switching.
5. active stylus according to claim 4, wherein,
The signal processing part is configured in action in the second mode, is determined a need for defined second round Switching to the first mode, on the other hand, continue ground in the cycle interruption of the second round and repeatedly send second hair The number of delivering letters.
6. active stylus according to claim 4, wherein,
Judge whether the active stylus is in use in the action of the signal processing part in the second mode, The detection operation of the uplink signal is carried out in the case of being judged to being not in use.
7. active stylus according to claim 6, wherein,
Judge the active touch-control in the action of the signal processing part based on pen pressure grade and in the second mode Whether pen is in use.
8. active stylus according to claim 1, wherein,
The active stylus is also equipped with input unit, and the input unit is configured to receive the operation of user's progress,
User's operation that the signal processing part is received based on the input unit, to determine a need for first mould The switching of formula or the second mode.
9. according to active stylus according to any one of claims 1 to 8, wherein,
The signal processing part has：
Boosting section, the voltage supplied from the power supply is boosted；
First switch portion, between the output end of the boosting section and the electrode；And
Control unit, grade is pressed to switch the on-off in the first switch portion according to the pen, so as to generate first hair The number of delivering letters.
10. active stylus according to claim 9, wherein,
The control unit presses grade to switch the first switch by on-off modulation or frequency modulation(PFM) according to the pen The on-off in portion.
11. the active stylus according to claim 9 or 10, wherein,
The signal processing part also has：
Oscillating portion, generate sine wave signal；
Enlarging section, amplify the sine wave signal；And
Second switch portion, between the output end of the enlarging section and the electrode,
The control unit presses grade to switch the on-off in the second switch portion according to the pen, so as to generate described second Send signal.
12. active stylus according to claim 11, wherein,
The control unit is modulated by on-off, and presses grade to break to switch the connection in the second switch portion according to the pen Open.
13. the active stylus according to claim 9 or 10, wherein,
The signal processing part also has：
Oscillating portion, generate sine wave signal；And
Enlarging section, the sine wave signal is amplified, and the electrode is exported,
The control unit presses grade to control the oscillating portion according to the pen, and signal is sent so as to generate described second.
14. according to active stylus according to any one of claims 1 to 8, wherein,
The signal processing part has：
Oscillating portion, generate sine wave signal；
Enlarging section, amplify the sine wave signal；
Rectification part, rectification is carried out to the output signal of the enlarging section；
First switch portion, between the output end of the rectification part and the electrode；
Second switch portion, between the output end of the enlarging section and the electrode；And
Control unit, grade is pressed to switch the first switch portion according to the pen in the state of the second switch portion is disconnected On-off, so as to generate it is described first send signal, on the other hand, by the first switch portion disconnect in the state of root Press grade to switch the on-off in the second switch portion according to the pen, signal is sent so as to generate described second.
15. a kind of active stylus, will letter via the coupled capacitor formed between the active stylus and sensor The change of breath and electric field is established accordingly to be sent to sensor controller, wherein,
The active stylus possesses：
Core body, form nib；
Electrode, near the core body；
Pen pressure test section, the corresponding pen pressure grade of pen pressure for detecting with putting on the core body；
Power supply；And
Signal processing part,
The signal processing part,
Acted by the either mode of the electric power that is supplied from the power supply in the first pattern and in second mode,
In action in the first mode, will according to the pen press grade spike train is modulated obtained from first hair The number of delivering letters supplies to the electrode, on the other hand, passes through the letter received during no transmission the first transmission signal Number determine a need for the switching to the second mode,
In action in the second mode, grade will be pressed according to the pen and by with being modulated to the spike train Second transmission signal of the different modulation system generation of modulation system supplies to the electrode, on the other hand, determines a need for Switching to the first mode,
The action under the second mode is switched in the case where being judged to needing the switching to the second mode, is being judged The action under the first mode is switched in the case of to need the switching to the first mode.
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